Stabilized resonant tag circuit and deactivator
First Claim
1. A resonant tag circuit for use as an electronic article surveillance tag, comprising:
- a flexible substantially planar dielectric substrate having a first side and a second side;
a first conductor positioned on said first side of said dielectric substrate;
a second conductor positioned on said second side of said dielectric substrate, wherein at least one of said conductors comprises an inductor; and
a flexible, substantially planar, tear resistant, polymeric film adhered to and covering one of said conductors and said substrate on the side of said substrate opposite to the side which is to be adhered to an article subject to surveillance, said film providing a vapor barrier for said one conductor and substrate minimizing effects of body detuning on said circuit, and promoting the secured integrity of said tag while maintaining the flexibility thereof.
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Accused Products
Abstract
A stabilized resonant tag circuit and deactivator therefore for use as an electronic article surveillance tag. The tag has a flexible substantially planar dielectric substrate having conductors positioned on either side, at least one of the conductors including an inductor. The tag is stabilized by a flexible, substantially planar, tear-resistant, polymeric film adhered to and covering one of the conductors and the substrate. The film provides a vapor barrier which minimizes the effects of body detuning on the circuit and promotes the secured integrity of the tag. Another embodiment of the present invention is a stabilized deactivatable resonant tag circuit, further including a deactivator for deactivating the tag in response to an electromagnetic field of sufficient energy to destroy the resonant properties of the circuit, the deactivator being an indented portion of at least one of the conductors such that the conductors are closer to each other at the indented portion than at the remainder of the conductor.
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Citations
23 Claims
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1. A resonant tag circuit for use as an electronic article surveillance tag, comprising:
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a flexible substantially planar dielectric substrate having a first side and a second side; a first conductor positioned on said first side of said dielectric substrate; a second conductor positioned on said second side of said dielectric substrate, wherein at least one of said conductors comprises an inductor; and a flexible, substantially planar, tear resistant, polymeric film adhered to and covering one of said conductors and said substrate on the side of said substrate opposite to the side which is to be adhered to an article subject to surveillance, said film providing a vapor barrier for said one conductor and substrate minimizing effects of body detuning on said circuit, and promoting the secured integrity of said tag while maintaining the flexibility thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A deactivatable resonant tag circuit having a predetermined resonant frequency for use as an electronic article surveillance tag, comprising:
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a flexible substantially planar dielectric substrate having a first side and a second side; a first conductor positioned on said first side of said dielectric substrate; a second conductor positioned on said second side of said dielectric substrate, wherein at least one of said conductors comprises an inductor; means for deactivating said resonant tag circuit in response to an electromagnetic field of sufficient energy to destroy the resonant properties of said circuit, said deactivating means comprising a portion of at least one of said conductors which is indented in said substrate such that said conductors are closer to each other at said indented portion than the remainder of the conductor; and a flexible, substantially planar, tear resistant, polymeric film adhered to and covering one of said conductors and said substrate on the side of said substrate opposite to the side which is to be adhered to an article subject to surveillance, said film providing a vapor barrier for said one conductor and substrate minimizing effects of body detuning on said circuit, and promoting the secured integrity of said tag while maintaining the flexibility thereof. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification